Curious circular pits off South Africa’s Eastern Cape coast are larger than any similar feature previously recorded. Their origin remains a morphological mystery.
unsolved mysteries
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Ancient Victims of Vesuvius May Have Baked in a Cloud of Ash
Debate still swirls around what killed ancient Romans during the 79 CE eruption. A study of wood charred by the event suggests a brief, but searing, flow of volcanic gas and debris.
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Tiny Martian Moon May Be a Chip Off the Old Block
A close approach to Deimos reveals that its surface does not look like that of an asteroid, hinting at a Martian origin.
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A Mission to Uranus Could Help Find Planet 9
Narrowing down the search is essential for gaining time on a high-powered telescope that could spot the hypothesized planet directly.
Posted inFeatures
Hunting for Methane Hot Spots at the Top of the World
A visit to an Alaskan wetland with some of the world’s highest lake marsh methane emissions brings scientists one step closer to understanding the phenomenon.
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Molten Meteorites Didn’t Deliver Earth’s Water
A new study has ruled out large, once-molten meteorites called achondrites as sources of Earth’s water.
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Asteroid Impacts Could Have Warmed Ancient Mars
Hydrogen released during large impacts might have boosted Mars’s surface temperature above freezing for thousands or even millions of years, enabling liquid water to flow over the Red Planet.
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Hydrogen May Push Some Exoplanets off a Cliff
High-pressure reactions of hydrogen and iron could explain gaps in the distribution of exoplanets.
Posted inResearch Spotlights
El hierro está en el centro de este debate de las ciencias de la Tierra
Un nuevo estudio investiga el estado del hierro en el interior del planeta. Los hallazgos tienen repercusiones para comprender la estructura del núcleo interno.
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Newly Discovered Salts May Exist on Icy Moons
For the first time in more than a century, scientists have identified new sodium chloride crystals. The discovery may reconcile puzzling spectroscopic images of Europa’s surface.